book Maths Puzzle Numerical Ability

the length of a rectangle plus its width is 30 cm. the area is 221 square cm. how long is the longest side of the rectangle?

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book Other Question

Identify the shape of the graph, transform it into standard form, and sketch the graph.
y = (2/3)x^2 - 8x + 29 Find the volume and surface area of a right-circular cylinder for which the base has a diameter measuring 14 feet and a height which measures 3 yards.